Yellow/Green Discharge!?

unknown

My period is due in 5-6 days, so I’m also having my normal clear discharge. But for two days now, when I wipe, I have noticed a yellowish color discharge (I thought it was from pee- ringing the color) but today, I notice it’s actually a yellow green color. Sounds disgusting, but like a booger? It’s not a lot at all - Could this be a yeast infection? My vagina was super itchy the other night before bed, but that was the only time it had felt itchy. It does not burn to pee. And I do not have an STD/STI.